Stent for bile duct

Abstract

The present invention relates to a stent which is inserted into a stenosed bile duct to enlarge the bile duct. The stent includes a plurality of hooks which extend outwards from the main body of the stent at a predetermined angle and are spaced apart from each other. Therefore, when the stent is inserted into the bile duct, the hooks that extend outwards from the main body at a predetermined angle are hooked to the inner surface of the bile duct, thus preventing the stent from slipping relative to the bile duct.

1 . A stent for a bile duct, comprising:
 a main body formed of metal wires in a hollow cylindrical shape; and   a plurality of hooks provided on the main body by extending one of the metal wires of the main body outwards from the main body at a predetermined angle,   the hooks being spaced apart from each other with respect to a circumferential direction of the main body.   
     
     
         2 . The stent for the bile duct according to  claim 1 , wherein the angle between each of the hooks and the main body is greater than 0° and less than 90°. 
     
     
         3 . The stent for the bile duct according to  claim 1 , wherein the hooks are disposed on a circumferential outer surface of the main body at positions symmetrical to each other. 
     
     
         4 . The stent for the bile duct according to  claim 1 , wherein at least one or more of the hooks are arranged in the circumferential direction of the main body, thus forming a row of hooks,
 wherein the row of hooks comprises a plurality of rows of hooks that are provided in a longitudinal direction of the main body.   
     
     
         5 . The stent for the bile duct according to  claim 1 , further comprising
 a hook cover covering a surface of each of the hooks made of the metal wire.   
     
     
         6 . The stent for the bile duct according to  claim 1 , further comprising
 a body cover covering a surface of the main body made of the metal wires, the body cover having a hollow cylindrical shape.   
     
     
         7 . The stent for the bile duct according to  claim 1 , wherein the main body comprises at least one row of metal wire formed by extending a metal wire in the circumferential direction in a zigzag manner such that a peak part and a valley part are formed in the row of metal wire.